Latest Articles from Zoosystematics and Evolution Latest 3 Articles from Zoosystematics and Evolution https://zse.pensoft.net/ Fri, 29 Mar 2024 14:29:01 +0200 Pensoft FeedCreator https://zse.pensoft.net/i/logo.jpg Latest Articles from Zoosystematics and Evolution https://zse.pensoft.net/ A new species of free-living marine nematode, Fotolaimus cavus sp. nov. (Nematoda, Oncholaimida, Oncholaimidae), isolated from a submarine anchialine cave in the Ryukyu Islands, southwestern Japan https://zse.pensoft.net/article/109097/ Zoosystematics and Evolution 99(2): 519-533

DOI: 10.3897/zse.99.109097

Authors: Daisuke Shimada, Keiichi Kakui, Yoshihisa Fujita

Abstract: Fotolaimus cavus sp. nov. was described from a submarine anchialine cave called Akuma-no-yakata on the Shimoji Island, Miyako Island Group, Ryukyu Islands, southwestern Japan. This is the first free-living marine nematode isolated from a submarine cave in Japan, and the third species of the genus Fotolaimus. This new species differs from its congeners by its small body size, wide amphids, long buccal cavity, long conico-cylindrical tail, and proximally curved gubernaculum. We provide amended dichotomous keys to genera in the subfamily Oncholaiminae and species in Fotolaimus. We also analyzed partial DNA sequences encoding ribosomal small subunit RNA and cytochrome c oxidase subunit I from Fotolaimus cavus sp. nov. and six other species of Oncholaimidae collected from Japanese waters. The phylogenetic tree based on the ribosomal small subunit RNA sequences using maximum likelihood analysis suggested a close relationship between Fotolaimus and Wiesoncholaimus as well as Oncholaimus. The topology of the tree was similar to those from previous studies; however, it suggested a new phylogenetic position of Adoncholaimus as a sister clade for Viscosia and Oncholaimus.

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Research Article Mon, 6 Nov 2023 16:42:21 +0200
Description of Longidorus bordonensis sp. nov. from Portugal, with systematics and molecular phylogeny of the genus (Nematoda, Longidoridae) https://zse.pensoft.net/article/49022/ Zoosystematics and Evolution 96(1): 175-193

DOI: 10.3897/zse.96.49022

Authors: Carlos Gutiérrez-Gutiérrez, Margarida Teixeira Santos, Maria Lurdes Inácio, Jonathan D. Eisenback, Manuel Mota

Abstract: The genus Longidorus currently comprises 176 species of polyphagous plant ectoparasites, including eight species that vector nepoviruses. Longidorus is one of the most difficult genera to accurately identify species because of the similar morphology and overlapping measurements and ratios among species. Sequences of ribosomal RNA (rRNA)-genes are a powerful level-species diagnostic tool for the genus Longidorus. From 2015 to 2019, a nematode survey was conducted in vineyards and agro-forest environments in Portugal. The populations of Longidorus spp. were characterized through an integrative approach based on morphological data and molecular phylogenetic analysis from rRNA genes (D2-D3 expansion segments of the 28S, ITS1, and partial 18S), including the topotype of L. vinearum. Longidorus bordonensis sp. nov., a didelphic species recovered from the rhizosphere of grasses, is described and illustrated. Longidorus vineacola, with cork oak and wild olive as hosts, is also characterized. This is the first time that L. wicuolea, from cork oak, is reported for Portugal. Bayesian inference (BI) phylogenetic trees for these three molecular markers established phylogenetic relationships among the new species with other Longidorus spp. Phylogenetic trees indicated that i) L. bordonensis sp. nov. is clustered together with other Longidorus spp. and forms a sister clade with L. pini and L. carpetanensis, sharing a short body and odontostyle length, and elongate to conical female tail, and ii) all the other species described and illustrated are phylogenetically associated, including the topotype isolate of L. vinearum.

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Research Article Tue, 5 May 2020 08:25:57 +0300
Two new skink-endoparasitic species of Meteterakis (Nematoda, Heterakidae, Meteterakinae) from East Asian islands https://zse.pensoft.net/article/27091/ Zoosystematics and Evolution 94(2): 339-348

DOI: 10.3897/zse.94.27091

Authors: Naoya Sata

Abstract: Here, two new nematodes of Meteterakis Karve, 1930 from Taiwan and the western Japanese Archipelago that are endoparasitic to scincid lizards are described. The Taiwanese Meteterakis formosensis sp. n. and the Japanese Meteterakis occidentalis sp. n. can be distinguished from other congeners by the following characteristics: spicules 437–537 μm in length in M. formosensis sp. n. and 359–538 μm in M. occidentalis sp. n.; spicules with narrow alae, funnel-shaped, proximal ends ventrally bent; prevulval flap well-developed; gubernaculum mass absent; preclocal sucker with diameter of 35–47 μm in M. formosensis sp. n. and of 32–36 μm in M. occidentalis sp. n.; 9–15 caudal papillae on both lateral sides in M. formosensis sp. n. and 10–14 in M. occidentalis sp. n.; and relatively narrow lateral alae, ending at region near proximal end of spicule in male or at region anterior to anus in female. Meteterakis formosensis sp. n. is distinguished from M. occidentalis sp. n. by possessing spicules with hyaline pointed distal ends and well-developed cuticular backing structures. The present study suggests that lateral alae can be used as diagnostic character among the Meteterakis species, and it revealed that meteterakine nematodes mature in the host’s small intestine and then migrate to the rectum to oviposit.

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Research Article Fri, 6 Jul 2018 09:04:39 +0300